Loom-dobby.



No. a97,5es. l PATENTBD SEPT. 1, 190s.'

\ E. H. BALLoU.

LooM BOBBY.

LPPLIOATIOI FILED IDEOl 27', 1905.

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UNITED STATES PATENT OFFICE.

EUGENE H. BALLOU, OF PAWTUGKET, RHODE ISLAND, ASSIGNOR OF ONE-HALF TOLOR- RAINE MANUFACTURING COMPANY, OF PAWTUGKET, RHODE ISLAND, ACORPORATION OF RHODE ISLAND.

LOOM-BOBBY.

To all whom it may concern:

Be it known that I, EUGENE H. BALLOU, a citizen of the United States,residing at Pawtucket, in the county of Providence and State of RhodeIsland, have invented a new` and useful Im rovement in Looin-Dobbies, ofwhich the fo lowing is a specification.

This invention has reference to an improvement in looms and moreparticularly to an improvement in the shedding mechanism or dobbies oflooms in which one set of ack hooks are operated directly by analternate indicator finger of the series of indicator iingers acted uponby the pattern chain and theV other set of )ack hooks operated byalternate indicator fingers through the usual lifting needles.

In the usual construction of the harness o erating mechanism of a loom,known as t e dobby, each bar of the pattern chain has two rows of pegs.One alternate series of indicator fin ers are operated from one row ofpegs and t e other alternate series from the other row of pegs on thesame bar. The first alternate serles of indicator fingers operates thelower jack hook directly and the second alternate series of indicatorfingers operates the upperjack hooks through the lifting needles in theusual way. The lifting knives move alternately at each successive pickof the loom and when the jack hooks engage with them the correspondingharness is raised or lowered. One row of egs on the bar of the patternchain determines which harness and war threads shall be raised for acertain pick of t e shuttle, and the other row of egs on the same bardetermines the raising of) the harness and warp thread for the nextsucceeding pick of the shuttle. One bar of the pattern chain, therefore7represents two picks in the woven fabric and the pattern chain must havea sufficient number of bars to control the springing of the warp for thepattern of the whole length of the fabric.

In the weaving of a variety of goods such as fabrics having a stripe orplaid'effect or fabrics in which a knotted thread is thrown in atintervals, the length of the pattern chain required is objectionable onaccount of its cost, of labor and pegging, and the mechanism and powerrequired to carry andoperate it.

The object of my invention is to improve the construction of a loomdobby whereby fabrics having a stripe or plaid effect or in which aknotted thread or a peculiar weave Patented Sept. 1, 1908.

serial No. 293,443.

or pattern is followed. or preceded by a field of a plain weave oranother pattern, can be produced with a short length. of pattern chain.

Instead. of using each bar of the pattern chain to control .the warpthreads on two successive picks, as is the usual method heretofore used,in the pattern chains used in carrying out my invention, each barcontrols the springing of the warp for one pick only, and yet by the useof a controlling mechanism, which will be more fully describedhereinafter, a short pattern chain or, for some weaves, a cylinderprovided with a attern surface, will be suiiicient to weave fa rics ofany desired length in which two kinds of patterns or weaves are used atpredetermined intervals.v

My invention consists in the peculiar and novel construction ofmechanism operatively connected with a loom dobby, whereby the indicatorfingers are operated by a short pattern chain for one weave and thenoperated by another short attern chain for another weave, thereby eiminating the use of a long pattern chain and the consequent cost andpower required to drive the same, as will be more fully set forthhereinafter.`

Figure 1 is a vertical sectional View of a loom dobby provided with myimproved indicator finger operating mechanism.. Fig. 2 is a detailsectional view, showing the means for operatively connecting theindicator finger mechanism with the shuttle box operatmg mechanism ofthe loom, and Fig. 3 is a face view of the indicator finger grate frameof my improved indicator linger operating mechanism.

In the drawings, a indicates the end frame of a loom dobby usuallysecured to or forming a part of the side frame of a loom, a a vi ratorarm secured to a shaft a2 supported in bearings in the end frame a, a3a3 rods pivotally secured to the ends of the vibrator arm a', a* a4knives pivotally secured to the ends of the rods a3 a? and having asliding reciprocating movement in ways a5 a5 in the end frame a, and a6a harnesslevers of thenumber required to weave the patterns. In theosition shown in Fig. l all the other harness evers are directly back ofthe one shown and all are pivotally secured to the shaft a7 su orted inthe end frame o. Each of t e arness levers have a connector arm asivotally secured at its center to the harness ever. .Upper .and lowerjack hooks a and a1 are pivotally secured to the `ends of the connectlngarm as in a osition for the hooked ends of the jack hoo s to engage withthe knives a4 a4. A double series of indicator fingers a a having theouter ends 0,12 a12 are pivotally secured to the shaft (L13 supported inthe end frame a. In one alternate series of the indicator'iingers a aeach has the upwardlybent inner end a14 adapted to engage with a lowerjack hook al and the other alternate series of indicator fingers eachhas the straight inner end (1)5 adapted to engage with a needle al whichin turn engages with an upper jack hook a", the needles being supportedin the usual way in bars secured to the end frame a. So far as nowdescribed the construction is the usual construction of a dobby harnessoperating mechanism.

In carrying my invention into practice lI secure the L-shaped frames b bto the lower outer ends of the end frames e a of the dobby by bolts, asshown in Fig. 1. These frames are each constructed to have bearings forthe sprocket shafts c and d of the pattern chain sprocket c and theauxiliary pattern chain sprocket d and the upwardly-extending arms b andb2. The cross rods b3 b3 are secured in the ends of the arms b and b2and a supporting bar b* is secured to the frame b I) intermediate theshafts c and d. The sprockets c and d secured to their respectiveshafts, and the pattern chains c2 and 'd2 with their egs c3' and d3 areof the usual construction. he sprocket shaft c is revolved by a worm andgear (not shown) forming a part of the loom mechanism, and the sprocketshaft d is revolvedby a sprocket chain e connecting the sprocket e onthe shaft c with the s rocket 'ea on the shaft d, as shown in brokenines in.

Fig. 1.

A series of spaced indicator levers ff are pivotally secured to the rodb3 on the arm b above the pattern chain c2 in a position for the innerends of the levers to rest on the bar b4 and for the egs on the patternchain to engage with the levers, and a series of alterternately-spacedauxiliary indicator levers g g are pivotally secured to the rod b3 onthe arm b2 above the auxiliary pattern chain d2 in a position for theinner ends of the levers to rest on the bar b4 and for the pegs on theauxiliary pattern chain d2 to engage with the levers. The bar b4 holdsthe levers f and g in their'normal position free of the pattern chainsand prevents the same from wearing on the pattern chains. Two brackets hh, each having the downwardly-extending arm h with the bearing 7L, aresecured to the upper outer end of the frame a of the dobby by the bolth3 in a position to bring the bearing h2 on a vertical line with the barb4 or centrally with the inner ends of the indicator levers f and g.swinging grate frame 'i having the arms i L supporting the lower crossbar 'i2 in which is a series of vertical holes fi, t3, the

lsecured at the upper end of the arms t" 'i' to the bearings h2 h2 onthe brackets 7L 7L in a position .for the ends 0.12 a of the indicatorfingers all e to pass through the openings t i in the frame and rest onthe heads of the pins and for the indicator levers f or g to engage withthe pins. A link 7c is pivotally secured at one end. to the -rear arm iof the frame 'i and at the other end to the vertical arm l of a bellcrank lever l having the horizontal arm Z2. This bell crank lever lispivotally secured to a shaft m supported in a racket m which is securedto a part of the loom frame. A series of levers n n are pivot- 'allysecured to the shaft m, and the rods n a are pivotally secured to thefree ends of the levers, as shown in Fig. 2. These rods'n a areoperatively connected to the shuttle box operating mechanism of the loom(not shown). The chain o controlling the shuttle box operating'mechanism has a series of collars o adapted to engage with the levers 'an and one or more off-set collars p adapted to engage with thehorizontal arm Z2 of the bell crank lever Z. The chain o (only a part ofwhich is shown in Fig. 2) is continuous andis moved in the direction ofthe arrow by revolving the sprocket oZ on the shaft 03 which is revolvedby .the usual worm and gear forming part of the loom mechanism.

A coiled spring s is secured at one end to the rear arm i of the frame iand at the other end to the frame a of the dobby, as shown in Fig. 1.The spring s holds the frame 'i in its no rmal position with the pins i7i? over the indicator levers f f, as shown in full lines in Fig. 1.

In the operation of my improved loom dobby the pattern chain c2, theauxiliary pattern chain d2 and thev shuttle box controlling mechanismchain. o are revolved by the loom mechanism, as described. The pegs c3c3 on the bars of the pattern chain c may be set to weave a plainpattern and the pegs d3 d3 on the bars of the auxiliary pattern chain d2may be set to weave a fancy pattern. The pins i7 i7 in the swinginggrate frame i are held in their normal position over the indicatorlevers f f by the tension of the s ring s, as shown in full lines inFig. 1, or so ong as there is an absence ofthe off-set collars p p onthe shuttle box` controlling mechanism chain o. With the mechanism inthis position a plain Weave. may -be woven by the pegs c34 c3 on thebars lof the pattern chain c2 engaging with and raising the pins 'i7 "i7the indicator levers f f alternately and throu h raise the ends a a12 ofthe in icator fingers at a a and allow a jack hook a or a10 to engagewith the knives a* a* to o erate the harness levers af a and raise t eharnesses in the usual way. At the end of the lain weave an off-setcollar p on the shuttle box controlling mechanism chain o engages withand raises the arm l2 of the bell crank lever l and through the arm Z ofthe bell crank lever and the link k moves the frame i and the pins i7over the indicator levers g g, as shown in broken lines in Fig. 1,against the tension of the spring s. A fancy weave is nowwoven throughthe operation of the pegs d d3 on the bars of the auxiliary patternchain d2 engaging with and raising the auxiliary indicator levers g gwhich, acty ing on the pins i7 i7, raise the ends a2 a,12 of t'heindicator fingers a a, which allows the A.jack hooks to engage with theknives and operates the indicator harness as described. When an off-setcollar p on the shuttle box controlling mechanism chain o passes the armll of the bell crank lever l, the framei assumes its normal position bythe tension of the spring s and the plain weave commences again, andthus o )erations may be repeated indefinitely wit short pattern chains,thus eliminating the cost, labor in pcgging and mechanism and powerrequired to car and operate a long pattern chain.

Having thus described my invention7 I claim as new and desire to secureby Letters Patent 1. In a loom dobby comprising dobby frame indicatorfingers and a swinging frame 'i having .the arms 'i' i supporting thelower cross bar i in which are the vertical holes 1'. i, said frame alsoprovided with an upper cross bar i* and vertical connecting bars i5 'ibetween the upper and lower cross bars forming the openings fi i for theindicator fingers of the dobby, pins i? i7 in the holes i 1,3 and havingthe heads i is in the openings fi" i, means for pivotally securing theswinging frame 1', to the dobby frame, means for swinging the frame atpredetermined intervals, the pattern chain, the auxiliary pattern chain,and means for alternately connecting the pins fi" 'i7 with a patternchain or an auxiliary pattern chain.

2. The combination with a loom dobby, of frames b b secured to the dobbyframe, rods b3 b3 supported in the frames b b, a bar b4 suported in theframes, b b, a shaft c supported in bearings in the frames b b, asprocket wheel c secured to the shaft c, a pattern chain c2 on the srocket 'wheel c and having the pe s c3 c3, a s aft d supported inbearings in the rames b b, a sprocket wheel d secured to the shaft d, anauxiliary attern chain d2 on the sprocket wheel and Iiaving the egs d3cl3, a sprocket wheel e secured to the s aft c, a sprocket wheel e2secured to the shaft d, a chain e connecting the sprocket wheels e ande, a series of indicator levers ff pivotally secured to the rod b3 overthe pattern chain c2, a series of indicator fingers, a series ofauxiliary indicator levers g g pivotally secured to the rod b3 over thepattern chain d2, brackets h h secured to the frame of the dobby eachhaving the arm h with the end bearing h2, a swinging frame 'i having thearms 'i' t pivotally secured to the bearing h in the racket h and suporting the lower cross bar i2 in which are t e vertical holes L3 i3,said frame also provided with an upper cross bar i4, and verticalconnecting bars 'L5 i5 between the upper and lower cross bars formingthe openings i fi for the indicator fingers of the dobby, pins i7 L7 inthe holes fi? i3 and having the heads i 'is in the openings fi i", alink k pivotally secured to the rear arm 'i' of the frame i, a bellcrank lever l pivotally connected to the link k, a coiled spring sconnected to the frame i and to the frame of the dobby, and means foroperating the bell crank lever Z at predetermined intervals.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EUGENE H. BALLOU.

Witnesses:

ADA E. HAGERTY, J. A. MILLER.

